Paper · 1967 · Canadian Journal of Plant Science

EFFECT OF NITROGEN, PHOSPHORUS, POTASSIUM, AND MANURE ON SIZE, RATE OF DEVELOPMENT, AND YIELD OF BRUSSELS SPROUTS

J. A. Cutcliffe; D. C. MacKay; D. C. Munro

10
claims
20
verbatim quotes
11
citations
2
research areas
—
Not open access

Abstract

A factorial experiment was conducted during three successive cropping seasons to investigate the effects of nitrogen, phosphorus, potassium, and manure on the growth and yield of Brussels sprouts. Plant development was delayed by a lack of phosphorus. Nitrogen and phosphorus applications decreased the yields of small sprouts and increased the yields of those greater than 2.3 cm in diameter. Total marketable yields were substantially increased by nitrogen and phosphorus but were only slightly affected by rates of applied potassium. Yield increases from high rates of nitrogen were obtained only when accompanied by adequate phosphorus. A manure treatment slightly increased marketable yields but the effect was usually not significant.

Abstract from the paper’s OpenAlex record, shown for indexing and research. Copyright remains with the authors or the publisher. Read at the source ↗

The text the model read, with the source record’s inline markup (italics, sub- and superscripts) rendered and its character entities decoded; quote offsets refer to the raw text.

Claims 10

Intervention effectobservedoriginal resultnegativemeasured

Claim · model-written summary

Lack of phosphorus delayed Brussels sprouts development.

Treatment
a lack of phosphoruse0
Outcome
Plant developmente0
Direction
delayede0

Not reportedComparator

Organisms pictured · Representative pictures of the matched species, not figures from the paper.

Brassica oleracea var. gemmifera
Brassica oleracea var. gemmifera · TaxonEric Hunt · CC BY 2.5 · Wikimedia Commons ↗

Verbatim

e0

“Plant development was delayed by a lack of phosphorus”

✓ located verbatim in the source · abstract, characters 197–250 · show in text ↑
t0

“BRUSSELS SPROUTS”

✓ located verbatim in the source · title, characters 97–113 · show in text ↑
Intervention effectobservedoriginal resultmeasured

Claim · model-written summary

Nitrogen application decreased yield of small sprouts.

Treatment
Nitrogene0
Outcome
yields of small sproutse0
Direction
decreasede0

Not reportedComparator

Organisms pictured · Representative pictures of the matched species, not figures from the paper.

Brassica oleracea var. gemmifera
Brassica oleracea var. gemmifera · TaxonEric Hunt · CC BY 2.5 · Wikimedia Commons ↗

Verbatim

e0

“Nitrogen and phosphorus applications decreased the yields of small sprouts”

✓ located verbatim in the source · abstract, characters 252–326 · show in text ↑
t0

“BRUSSELS SPROUTS”

✓ located verbatim in the source · title, characters 97–113 · show in text ↑
Intervention effectobservedoriginal resultmeasured

Claim · model-written summary

Phosphorus application decreased yield of small sprouts.

Treatment
phosphoruse0
Outcome
yields of small sproutse0
Direction
decreasede0

Not reportedComparator

Organisms pictured · Representative pictures of the matched species, not figures from the paper.

Brassica oleracea var. gemmifera
Brassica oleracea var. gemmifera · TaxonEric Hunt · CC BY 2.5 · Wikimedia Commons ↗

Verbatim

e0

“Nitrogen and phosphorus applications decreased the yields of small sprouts”

✓ located verbatim in the source · abstract, characters 252–326 · show in text ↑
t0

“BRUSSELS SPROUTS”

✓ located verbatim in the source · title, characters 97–113 · show in text ↑
Intervention effectobservedoriginal resultpositivemeasured

Claim · model-written summary

Nitrogen application increased yield of sprouts greater than 2.3 cm diameter.

Treatment
Nitrogene0
Outcome
yields of those greater than 2.3 cm in diametere0
Direction
increasede0

Not reportedComparator

Organisms pictured · Representative pictures of the matched species, not figures from the paper.

Brassica oleracea var. gemmifera
Brassica oleracea var. gemmifera · TaxonEric Hunt · CC BY 2.5 · Wikimedia Commons ↗

Verbatim

e0

“Nitrogen and phosphorus applications decreased the yields of small sprouts and increased the yields of those greater than 2.3 cm in diameter”

✓ located verbatim in the source · abstract, characters 252–392 · show in text ↑
t0

“BRUSSELS SPROUTS”

✓ located verbatim in the source · title, characters 97–113 · show in text ↑
Intervention effectobservedoriginal resultpositivemeasured

Claim · model-written summary

Phosphorus application increased yield of sprouts greater than 2.3 cm diameter.

Treatment
phosphoruse0
Outcome
yields of those greater than 2.3 cm in diametere0
Direction
increasede0

Not reportedComparator

Organisms pictured · Representative pictures of the matched species, not figures from the paper.

Brassica oleracea var. gemmifera
Brassica oleracea var. gemmifera · TaxonEric Hunt · CC BY 2.5 · Wikimedia Commons ↗

Verbatim

e0

“phosphorus applications decreased the yields of small sprouts and increased the yields of those greater than 2.3 cm in diameter”

✓ located verbatim in the source · abstract, characters 265–392 · show in text ↑
t0

“BRUSSELS SPROUTS”

✓ located verbatim in the source · title, characters 97–113 · show in text ↑
Intervention effectobservedoriginal resultpositivemeasured

Claim · model-written summary

Nitrogen substantially increased total marketable yields.

Treatment
nitrogene0
Outcome
Total marketable yieldse0
Direction
increasede0

Not reportedComparator

Organisms pictured · Representative pictures of the matched species, not figures from the paper.

Brassica oleracea var. gemmifera
Brassica oleracea var. gemmifera · TaxonEric Hunt · CC BY 2.5 · Wikimedia Commons ↗

Verbatim

e0

“Total marketable yields were substantially increased by nitrogen and phosphorus”

✓ located verbatim in the source · abstract, characters 394–473 · show in text ↑
t0

“BRUSSELS SPROUTS”

✓ located verbatim in the source · title, characters 97–113 · show in text ↑
Intervention effectobservedoriginal resultpositivemeasured

Claim · model-written summary

Phosphorus substantially increased total marketable yields.

Treatment
phosphoruse0
Outcome
Total marketable yieldse0
Direction
increasede0

Not reportedComparator

Organisms pictured · Representative pictures of the matched species, not figures from the paper.

Brassica oleracea var. gemmifera
Brassica oleracea var. gemmifera · TaxonEric Hunt · CC BY 2.5 · Wikimedia Commons ↗

Verbatim

e0

“Total marketable yields were substantially increased by nitrogen and phosphorus”

✓ located verbatim in the source · abstract, characters 394–473 · show in text ↑
t0

“BRUSSELS SPROUTS”

✓ located verbatim in the source · title, characters 97–113 · show in text ↑
Intervention effectobservedoriginal resultmeasured

Claim · model-written summary

Potassium rates affected total marketable yield only slightly.

Treatment
rates of applied potassiume0
Outcome
Total marketable yieldse0

Not reportedComparatorDirection

Organisms pictured · Representative pictures of the matched species, not figures from the paper.

Brassica oleracea var. gemmifera
Brassica oleracea var. gemmifera · TaxonEric Hunt · CC BY 2.5 · Wikimedia Commons ↗

Verbatim

e0

“Total marketable yields were substantially increased by nitrogen and phosphorus but were only slightly affected by rates of applied potassium”

✓ located verbatim in the source · abstract, characters 394–535 · show in text ↑
t0

“BRUSSELS SPROUTS”

✓ located verbatim in the source · title, characters 97–113 · show in text ↑
Intervention effectobservedoriginal resultpositivemeasured

Claim · model-written summary

High nitrogen rates increased yield only with adequate phosphorus.

Treatment
high rates of nitrogene0
Outcome
Yielde0
Direction
increasese0
Qualifier
only when accompanied by adequate phosphoruse0

Not reportedComparator

Organisms pictured · Representative pictures of the matched species, not figures from the paper.

Brassica oleracea var. gemmifera
Brassica oleracea var. gemmifera · TaxonEric Hunt · CC BY 2.5 · Wikimedia Commons ↗

Verbatim

e0

“Yield increases from high rates of nitrogen were obtained only when accompanied by adequate phosphorus”

✓ located verbatim in the source · abstract, characters 537–639 · show in text ↑
t0

“BRUSSELS SPROUTS”

✓ located verbatim in the source · title, characters 97–113 · show in text ↑
Intervention effectobservedoriginal resultpositivenot significant (as stated)measured

Claim · model-written summary

Manure slightly increased marketable yields, usually without statistical significance.

Treatment
manure treatmente0
Outcome
marketable yieldse0
Direction
increasede0

Not reportedComparator

Organisms pictured · Representative pictures of the matched species, not figures from the paper.

Brassica oleracea var. gemmifera
Brassica oleracea var. gemmifera · TaxonEric Hunt · CC BY 2.5 · Wikimedia Commons ↗

Verbatim

e0

“A manure treatment slightly increased marketable yields but the effect was usually not significant”

✓ located verbatim in the source · abstract, characters 641–739 · show in text ↑
t0

“BRUSSELS SPROUTS”

✓ located verbatim in the source · title, characters 97–113 · show in text ↑

nitrogen · yield · Brassica oleracea (wild cabbage)Results differ

164 papers: 144 positive, 20 negative or no effect

143 papers in the same direction as this paper · 17 in the opposite direction · 3 reporting no difference from an alternative

  1. positive
  2. positive
  3. negative

160 papers more in this group

See all 164 papers →

phosphorus · quality: postharvest · Brassica oleracea (wild cabbage)Positive and negative results

6 papers: 5 positive, 1 negative or no effect

4 papers in the same direction as this paper · 1 in the opposite direction

  1. negative
  2. positive
  3. positive

2 papers more in this group

See all 6 papers →

phosphorus · growth · Brassica oleracea (wild cabbage)Positive and negative results

30 papers: 26 positive, 4 negative or no effect

25 papers in the same direction as this paper · 3 in the opposite direction · 1 reporting no difference from an alternative

This paper is about lacking the nutrient, so it counts the other way round here.

  1. negative
    Low P supply increased root growth parameters.

    Phosphorus-use efficiency of kale genotypes from coastal Croatia · 2015

    Opposite directionAbout lacking this nutrient, so it counts the other way round

  2. negative
  3. no effect

26 papers more in this group

See all 30 papers →

nitrogen · quality: postharvest · Brassica oleracea (wild cabbage)Positive and negative results

40 papers: 34 positive, 6 negative or no effect

33 papers in the same direction as this paper · 6 in the opposite direction

  1. no effect
  2. no effect
  3. negative

36 papers more in this group

See all 40 papers →

fertilization · quality: postharvest · Brassica oleracea (wild cabbage)Positive and negative results

55 papers: 50 positive, 5 negative or no effect

49 papers in the same direction as this paper · 4 in the opposite direction · 1 reporting no difference from an alternative

  1. no effect
  2. no effect
  3. no effect

51 papers more in this group

See all 55 papers →

phosphorus · yield · Brassica oleracea (wild cabbage)Positive and negative results

56 papers: 54 positive, 2 negative or no effect

53 papers in the same direction as this paper · 2 in the opposite direction

  1. positive
  2. negative
  3. no effect

52 papers more in this group

See all 56 papers →

Claims are grouped by organism, treatment and what was measured or targeted. A paper counts as positive when any of its claims in the group is positive.